Implementation of wire voltage gap basis functions in Multidomain Electromagnetic Modeling for Installed Performance of Antennas on Aerostructures
Andre Barka* (1),Vincent Gobin(1), Pierre Caudrillier(1), Denis Clerc (2)
(1) ONERA-DEMR 2 avenue Edouard Belin BP4025 31055 Toulouse cedex AND (2) ATR 1 allée Pierre Nadot 31712 Blagnac Cedex France
Antennas are greatly affected by the structure on which they are installed. The purpose of the present research activity is to improve computer aided engineering design, and computational evaluation capabilities for the installation of antennas on aircraft structures. These improved capabilities will help to reduce the time and cost for positioning and installing antennas on aircraft. In this paper we describe the implementation of voltage gap wire functions in a sub-domain method for electromagnetic computations based on boundary element method. The benefits of the sub-domain method are the following 1) the computation can be split between several companies for collaborative studies 2) the computation time can be reduced by one or more orders of magnitude especially in the context of parametric studies. The accuracy and efficiency of this technique is assessed by Directivity computations of monopole antennas mounted on a generic aircraft model. Multidomain results obtained by combining two sets of sub-domains are compared with experimental data. The computations are made in the VHF band at 126 Mhz for several positions of the monopoles and several generator loads to show the benefits of the multidomain method for parametric studies. Several computations are presented hereafter with the objective to validate the multidomain technique by comparison with direct MoM methods and measurements provided by ATR but also to demonstrate the benefits of this approach for parametric studies. The length, wing span, and height are respectively 22.65, 24.56 and 7.586 m. The results obtained with the PAME code developed by ONERA are in a good agreement with both measurements and the EMC2000 and FEKO commercial tools.
IEEE Antennas and Propagation Society International Symposium
2005
June
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